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4
GENERAL INFORMATION
UNIQUE SPECIFICATIONS
NOTE:
The specifications below are specific to the model(s) as identified by
model number. The difference specifications are in addition to the
'COMMON SPECIFICATIONS' found on pages 2-4.
•
MODEL 840A:
SENSOR SELECTION:
K, J, T Thermocouples
ACCURACY:
(18°C to 28°C ambient, 2 years):
K, J, T;
±0.5°F (rdg
≥
-50°F).
±0.04% rdg (rdg > 1250°F)
±1.0°F (rdg < -50°F)
TEMPERATURE COEFFICIENT:
From 0°C to 18°C, and 28°C to 50°C;
less than
±(0.006% rdg +0.03°C)/°C.
RAMP FUNCTION:
Not Included.
BATTERY LIFE, CONTINUOUS:
16 hrs typical, alkaline; 4 hrs typical, Ni-Cd (rechargeable).
•
MODEL 845:
SENSOR SELECTION:
K, J, T, E, N, B, R, S, G, C, D Thermocouples
ACCURACY:
(18°C to 28°C ambient, 2 years):
K, J, T, E, N;
±0.5°F (rdg
≥
-50°F)
±1.0°F (rdg < -50°F)
B, R, S, G, C, D;
±1.7°F
TEMPERATURE COEFFICIENT:
From 0°C to 18°C, and 28°C to 50°C;
K, J, T, E, N;
±(0.002% rdg + 0.03°C)/°C
B, R, S, G, C, D;
±(0.002% rdg + 0.1°C)/°C
RAMP FUNCTION:
Included.
BATTERY LIFE, CONTINUOUS:
16 hrs typical, alkaline; 4 hrs typical, Ni-Cd (rechargeable).
• MODEL 850:
SENSOR SELECTION:
K, J, T, E Thermocouples
100
Ω
Platinum RTD
2252
Ω
Thermistor
1,000
Ω
/100,000
Ω
Resistance
ACCURACY:
(18°C to 28°C ambient, 2 years):
K, J, T, E;
±0.5 °F (rdg
≥
-50°F).
±0.04% rdg (rdg > 1250°F)
±1.0°F (rdg <-50°F)
OHMS;
±0.04% range
RTD;
±0.2°F (rdg
≥
- 50°F) (Calibrator mode)
±0.5°F (rdg < - 50°F) (Calibrator mode)
±0.2°F ±0.04% rdg
(rdg ≥
-50°F) (meter mode)
±0.5°F±0.04% rdg (rdg < -50°F) (meter mode)
Thermistor; ±0.5°F
TEMPERATURE COEFFICIENT
: From 0°C to 18°C, and 28°C to 50°C;
K, J, T, E;
±(0.006% rdg + 0.03°C)/°C
RTD, THERMISTOR, OHMS; ±(0.006% rdg +0.012% rng)/°C
RAMP FUNCTION:
Not Included.